The PC390LC-11 hydraulic excavator from Komatsu America has the same upper structure and improvements introduced with the PC360LC-11, but with a larger undercarriage and greater drawbar pull. The roller frames on the PC390LC-11 have a 6 percent wider track, 8 percent longer track on the ground and larger final drives for 13.5 percent greater draw pull, providing up to 18 percent greater over-the-side lift capacity than the PC360LC-11.
“Where the 390 really shines is with the larger undercarriage,” says Kurt Moncini, product manager, Komatsu America. “With varying ground conditions or inability to get really close to the edge of the trench, that greater over-the-side lift allows the 390 to sit a little farther back and still lay pipe.”
Powered by a Komatsu SAA6D114E-6 EPA Tier 4 Final engine that delivers 257 hp, the excavator has an operating weight of between 87,388 and 89,248 pounds. Both the PC390LC-11 and PC360LC-11 hydraulic systems feature an enhanced power mode for greater productivity and lower cost per ton. The ROPS and OPG level 1 certified cab has a heated air-suspension high-back seat, two 12-volt power ports and optional joysticks with proportional controls for attachment operation. The joysticks also have a standard pattern change valve.
“Being able to easily change the control pattern makes it a lot easier if you have operators used to different machines,” Moncini says. “Within 10 to 15 seconds the operator can change back and forth between ISO and Backhoe patterns.”
KOMTRAX technology relays fuel levels, diesel exhaust fluid (DEF) levels, operating hours, idle time, machine location, cautions and maintenance alerts to a smartphone or Web application. The operator identification system (OIS) reports key information for multiple operators while the auto idle shutdown function helps reduce idle time as well as operating costs. The OIS can segment machine data by individual operator, shift or application.
The Komatsu diesel particulate filter (KDPF) and selective catalytic reduction (SCR) system reduce particulate matter and NOx while providing automatic regeneration that does not interfere with daily operation. The 10.3-gallon DEF tank is located in a lockable compartment directly behind the right-side toolbox and is sized to provide a 2-1 diesel to DEF refill ratio.
Incorporated in the 7-inch LCD color monitor is a landscape view from the standard rear camera along with pertinent gauges and information.
“Each time you start the machine, your default camera view is on the left and normal gauge display on the right,” Moncini says. “With a lot of people around the machine, pipe liners really like the greater situational awareness because an operator can see what’s behind him and the vehicle information at the same time.” 847/437-5800; www.komatsuamerica.com
